Echinoderm Flashcards
Echinoderm
a marine invertebrate
Endoskeleton
provide rigidity and protection
Pedicellariae
small wrench- or claw-shaped appendage with movable jaws
Madreporite
essential part of the circulation system
Radial canal
one of the numerous minute canals lined with choanocytes
Ring canal
the circular water tube that surrounds the esophagus
Arm / Ray
part of the body opposite the mouth
Radial Symmetry
five equal segments radiating from a central body
Bilateral Symmetry
the property of being divisible into symmetrical halves on either side of a unique plane
Water Vascular System
hydraulic system used by echinoderms
Ambulacral Groove
extends from the mouth to the end of each ray or arm
Gonads
sexual reproductive glands
Central Disc
five or more feathery arms radiating from a central disk
Tube Feet
small active tubular projections on the oral face of an echinoderm
External Fertilization
fertilization of eggs by spermatozoa
Regeneration
remaking of tissues
Sea star
Common usage frequently finds these names being also applied to ophiuroids
Brittle star
They crawl across the sea floor using their flexible arms for locomotion
Echinoderm
a marine invertebrate
Gonads
sexual reproductive glands
Ampullae
important part of the water vascular system
Ossicles
a very small bone
radial symmetry
five equal segments radiating from a central body
Ring canal
the circular water tube that surrounds the esophagus
Central Disc
five or more feathery arms radiating from a central disk
Pedicellariae
small wrench- or claw-shaped appendage with movable jaws
Water Vascular System
hydraulic system used by echinoderms
Tube Feet
what they breathe through
Endoskeleton
provide rigidity and protection
